Walworth County tornado history

30 tornadoes touched Walworth County, South Dakota between 1950 and 2025 — about 0.4 a year. The strongest was rated EF4 (May 22, 2010).

30tornadoes since 1950

EF4strongest rating

0killed · 2 injured

24.6 milongest path · 1964

(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F015

(E)F18

(E)F24

(E)F32

(E)F41

(E)F50

JFMAMJJASOND

Peak month: June.

’50’60’70’80’90’00’10’20

Date	Rating	Path	Width	Injured
May 22, 2010	EF4	5.7 mi	1,200 yd	0
Jun 20, 1968	F3	8.8 mi	200 yd	0
Jun 20, 1968	F3	0.1 mi	10 yd	0
Jun 18, 1964	F2	24.6 mi	200 yd	2
Apr 19, 1955	F2	18.2 mi	27 yd	0
Jun 28, 1961	F2	1 mi	10 yd	0
Jul 3, 1959	F2	0.1 mi	10 yd	0
Apr 19, 1955	F1	4.6 mi	10 yd	0
Sep 14, 2025	EF1	4 mi	200 yd	0
Aug 6, 1986	F1	1.5 mi	40 yd	0
Jul 29, 1970	F1	0.5 mi	50 yd	0
May 22, 2010	EF1	0.5 mi	100 yd	0

Date	Rating	Path	Width
Sep 14, 2025	EF1	4 mi	200 yd
Jun 1, 2018	EF0	0.1 mi	10 yd
Jul 26, 2011	EF0	0.4 mi	10 yd
May 22, 2010	EF0	0.5 mi	50 yd
May 22, 2010	EF1	0.5 mi	100 yd
May 22, 2010	EF4	5.7 mi	1,200 yd
Jun 16, 2009	EF0	0.1 mi	10 yd
Aug 10, 2007	EF0	0.1 mi	10 yd
Jun 17, 2007	EF0	0.1 mi	10 yd
Jun 17, 2007	EF0	0.1 mi	10 yd
Jun 17, 2007	EF0	0.2 mi	20 yd
Jun 17, 2007	EF0	0.1 mi	10 yd

How many tornadoes has Walworth County, South Dakota had?

30 tornadoes touched Walworth County, South Dakota between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.4 per year.

What was the strongest tornado in Walworth County?

The strongest rating recorded was EF4 on May 22, 2010, with a 5.7-mile path.

When is tornado season in Walworth County?

Most of its tornadoes happened in June (14 of 30). Tornadoes can occur in any month, so keep alerts on year-round.

Right now: live tornado warnings map · alerts for your location. Dates link to that day’s full storm reports where available (2004 onward).